Thermal behavior and thermal safety on 3,3-dinitroazetidinium salt of perchloric acid

• Published in: Journal of thermal analysis and calorimetry Vol. 103; no. 2; pp. 569 - 575
• Main Authors: Ma, H. X., Yan, B., Ren, Y. H., Hu, Y., Guan, Y. L., Zhao, F. Q., Song, J. R., Hu, R. Z.
• Format: Journal Article
• Language: English
• Published: Dordrecht Springer Netherlands 01-02-2011; Springer
• Subjects: Adiabatic flow; Analytical Chemistry; Applied sciences; Calorimetry; Chemical industry and chemicals; Chemistry; Chemistry and Materials Science; Decomposition (Chemistry); Decomposition reactions; Exact sciences and technology; Explosions; Industrial chemicals; Inorganic Chemistry; Mathematical models; Measurement Science and Instrumentation; Perchloric acid; Physical Chemistry; Polymer Sciences; Powders, propellants, explosives; Reaction kinetics; Thermal decomposition; 3,3-Dinitroazetidine (DNAZ); Thermal behavior; Thermal safety; HClO; Nitro compound; Pyrolysis; Perchloric acid; Azetidine derivatives; Explosives; Thermal analysis; Kinetics; Safety
• ISSN: 1388-6150; 1588-2926; 1572-8943
• DOI: 10.1007/s10973-010-0950-2

3,3-Dinitroazetidinium (DNAZ) salt of perchloric acid (DNAZ·HClO
4
) was prepared, it was characterized by the elemental analysis, IR, NMR, and a X-ray diffractometer. The thermal behavior and decomposition reaction kinetics of DNAZ·HClO
4
were investigated under a non-isothermal condition by DSC and TG/DTG techniques. The results show that the thermal decomposition process of DNAZ·HClO
4
has two mass loss stages. The kinetic model function in differential form, the value of apparent activation energy (
E
a
) and pre-exponential factor (
A
) of the exothermic decomposition reaction of DNAZ·HClO
4
are
f
(
α
) = (1 − 
α
)
−1
/2, 156.47 kJ mol
−1
, and 10
15.12
 s
−1
, respectively. The critical temperature of thermal explosion is 188.5 °C. The values of Δ
S
≠
, Δ
H
≠
, and Δ
G
≠
of this reaction are 42.26 J mol
−1
 K
−1
, 154.44 kJ mol
−1
, and 135.42 kJ mol
−1
, respectively. The specific heat capacity of DNAZ·HClO
4
was determined with a continuous
C
p
mode of microcalorimeter. Using the relationship between
C
p
and
T
and the thermal decomposition parameters, the time of the thermal decomposition from initiation to thermal explosion (adiabatic time-to-explosion) was evaluated as 14.2 s.